# Plane Trigonometry and Tables

### Contents

 Section 1 1 Section 2 21 Section 3 50
 Section 4 51 Section 5 54 Section 6 54

### Popular passages

Page v - If the number is less than 1, make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.
Page iii - The logarithm of the root of a number is found by dividing the logarithm of the number by the index of the root. For, У2 = %/Ï0^ = 10*.
Page iv - If the number is greater than 1, make the characteristic of the logarithm one unit less than the number of figures on the left of the decimal point. If the number is less than 1, make the characteristic of the logarithm...
Page iv - And so on. 7. If the number is less than 1, the logarithm is negative (§ 6), but is written in such a form that the fractional part is always positive. For the number may be regarded as the product of two factors, one of which lies between 1 and 10, and the other is a negative power of 10 ; the logarithm will then take the form of a difference whose minuend is a positiTe proper fraction, and whose subtrahend is a positive integral number.
Page iii - The logarithm of a power of a number is found by multiplying the logarithm of the number by the exponent of the power. For, A« = (10°)
Page xiii - ... is employed as explained in § 26. If the angle is less than 45°, the number of degrees is printed at the top of the page, and the number of minutes in the column to the left of the columns containing the logarithm. If the angle is greater than 45°, the number of degrees is printed at the bottom of the page, and the number of minutes in the column to the right of the columns containing the logarithms. If the angle is less than 45°, the names of its functions are printed at the top of the page...